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CVE-2024-39687— Fedify vulnerable to allowing access to internal network resources

Quick assessment

Affected
dahlia fedify
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fedify是Hong Minhee个人开发者的一个 TypeScript 库。用于构建由 ActivityPub 和其他标准支持的联邦服务器应用程序。 Fedify 0.11.0及之前版本存在安全漏洞，该漏洞源于容易受到服务器端请求伪造攻击，允许攻击者向服务器网络内部的资源发送请求。

CVSS 7.2 · High EPSS 0.60% · P47
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I. Basic Information for CVE-2024-39687

Vulnerability Information
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Vulnerability Title
Fedify vulnerable to allowing access to internal network resources
Source: CVE Program / CVE List V5
Vulnerability Description
Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. At present, when Fedify needs to retrieve an object or activity from a remote activitypub server, it makes a HTTP request to the `@id` or other resources present within the activity it has received from the web. This activity could reference an `@id` that points to an internal IP address, allowing an attacker to send request to resources internal to the fedify server's network. This applies to not just resolution of documents containing activities or objects, but also to media URLs as well. Specifically this is a Server Side Request Forgery attack. Users should upgrade to Fedify version 0.9.2, 0.10.1, or 0.11.1 to receive a patch for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Fedify 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fedify是Hong Minhee个人开发者的一个 TypeScript 库。用于构建由 ActivityPub 和其他标准支持的联邦服务器应用程序。 Fedify 0.11.0及之前版本存在安全漏洞，该漏洞源于容易受到服务器端请求伪造攻击，允许攻击者向服务器网络内部的资源发送请求。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
dahlia fedify < 0.9.2 -

II. Public POCs for CVE-2024-39687

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9925 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
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POC zip download
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III. Intelligence Information for CVE-2024-39687

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Patches & Fixes for CVE-2024-39687 (2)

Vendor Advisories for CVE-2024-39687 (1)

IV. Related Vulnerabilities

Same product: fedify
Same vendor: dahlia
Same weakness: CWE-918

V. Comments for CVE-2024-39687

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